w2000 pro OS. factory installed samsung dvd-cdrom. installed liteon cd-rw and both worked fine. burn went bad, had to reboot. bios sees cd drives, dos sees neither, my computer shows no cd drives and device manager shows an "!" over both drives with an error code 31 "windows failed to load drivers". i uninstalled both drives and rebooted. reinstalled only the samsung after changing ide controllers to factory setting (i.e, cd rom is master) and I get the same problems, bios sees it, dos doesn't, my computer shows only, a:\ drive, c:\ drive and control panel and device manager shows a "!" over the samsung with the same error code 31. i've uninstalled the burner software. the drivers are where they should be. what did the burner do to my system? thanks